jQuery点击图片放大显示原图效果

HTML部分：
<div ></div>

JS代码部分：

//内容页图片点击放大效果

    var imgBoxMod=$(".ctnlist .text img");

    imgPop(imgBoxMod);

    //内容页图片点击放大效果函数主体开始

    function imgPop(imgBoxMod){

        imgBoxMod.each(function(){

        //超过最大尺寸时自动缩放内容页图片尺寸

        var ctnImgWidth=$(this).width();

        if(ctnImgWidth>618){

                $(this).width(618);

            }

        //点击图片弹出层放大图片效果

        $(this).click( function(){

            $("#append_parent").html("<div >//生成HTML代码

            var domHeight =$(document).height(); //文档区域高度

            $("#imgzoom_cover").css({"display":"block","height":domHeight});

            var imgLink=$(this).attr("src");

            $("#imgzoom_img #imgzoom_zoom").attr("src",imgLink);

            $("#imgzoom").css("display","block");

            imgboxPlace();

            })

    })

            //关闭按钮

    $("#append_parent .imgclose").live('click',function(){

        $("#imgzoom").css("display","none");

        $("#imgzoom_cover").css("display","none");

    })

        //新窗口打开图片

    $("#imgzoom_imglink").live('click',function(){

        var imgLink=$("#imgzoom_zoom").attr("src");

        $("#imgzoom_imglink").attr("href",imgLink);

    })

    //弹出窗口位置

    function imgboxPlace(){

        var cwinwidth=$("#imgzoom").width();

        var cwinheight=$("#imgzoom").height();

        var browserwidth =$(window).width();//窗口可视区域宽度

        var browserheight =$(window).height(); //窗口可视区域高度

        var scrollLeft=$(window).scrollLeft(); //滚动条的当前左边界值

        var scrollTop=$(window).scrollTop(); //滚动条的当前上边界值

        var imgload_left=scrollLeft+(browserwidth-cwinwidth)/2;

        var imgload_top=scrollTop+(browserheight-cwinheight)/2;

        $("#imgzoom").css({"left":imgload_left,"top":imgload_top});

        }

    }

    //内容页图片点击放大效果函数主体结束

CSS样式部分：

/* 图片放大弹出层 */

.zoominner {background: none repeat scroll 0 0 #FFFFFF; padding: 5px 10px 10px; text-align: left;}

.zoominner p {height:30px; _position:absolute; _right:2px; _top:5px;}

.zoominner p a { background: url("../images/imgzoom_tb.gif") no-repeat scroll 0 0 transparent; float: left; height: 17px; line-height: 100px; margin-left: 10px; overflow: hidden; width: 17px;}

.zoominner p a.imgadjust {background-position: -40px 0;}

.zoominner p a.imgclose { background-position: -80px 0; cursor:pointer;}

.y {float: right; margin-bottom:10px;}

.ctnlist .text img{ cursor:pointer;}

#imgzoom_cover{background-color:#000000; filter:progid:DXImageTransform.Microsoft.Alpha(Opacity=70); opacity:0.7; position:absolute; z-index:800; top:0px; left: 0px; width:100%; display:none;}

#imgzoom{ display:none; z-index:801; position:absolute;}

#imgzoom_img{_width:300px; _height:200px; min-width:300px; min-height:200px; background:url(../images/imageloading.gif) center center no-repeat;}

#imgzoom_zoomlayer{ _width:300px; _height:200px; _position:relative; _padding-top:30px; min-width:300px; min-height:200px;}

效果：
jQuery点击图片放大显示原图效果

效果演示页： http://www.ipsfan.com/koutu/2011-10-02/77.html

http://rt.ipsfan.com/blog-6-41.html